Freak the mighty

In my humanities class we are reading a book called Freak the Mighty and there is a charactor in the book named mighty (thats his nickname) Mighty is a very mean boy living with his sweet but clueless grandparents.
Mighty is the kind of boy who is very touchy, if you say that he looks wierd he would proably just punch you in the face.
In the book it said that mighty calls his grandparents Gram and Grim. When i heard the word grim it made me think of the grim reaper witch got me thinking that mighty proably dosn't like his grandparents all that much.
in the book we also meet a character named freak (also a nickname) freak, i think, is the kind of boy who is really sweet but if you get on his nerves he gets mad and hits you! freak is also disabled in a way where he has to use cruches. he also has a leg brace witch he thinks is super cool so he calls himself robot dude!!!